Gadgetory

you water has a density of about one gram per cubic centimeter aerogel has a density of 0.0 0.0 one six grams per cubic centimeter it's about 95 percent air yet it's quite rigid and you might be able to hear when I drop it on the tabletop and it's it's quite transparent this material is used to insulate the Mars exploration Rovers used by NASA on that spacecraft very good insulator very low density it was very weird like with this on the scale of one sort of weirdness has comes out quadrant a3 is it the blood asan a strange machine you asked did you offer I asked that no it's not this stuff is very odd it's called a ferrofluid or a magnetic liquid and what's happening here is a magnet down there and a bolt the magnetic field has been traveled channeled through and the liquid is is reacting to the mountain feel that's really odd not many liquids do that after this liquids got tiny nanoparticles magnetite in it normally if you put that kind of particle inner in a water solution they'll just get ripped out by the men in the field in this case has been coated with a surfactant and that's the factory the interface with the water which loves the water so they're held into the water and that makes the liquid behave as if it's magnetic it's called along with the particle and so it's kind of challenging these different shapes that all define by that magnetic field so you can you can confine a liquid with a magnetic field just by putting these tires on magnetic particles in there so the nanotechnology and it's kind of most beautiful Carmine's bachelors have used it because you in a way what you can do is you can kind of confine a liquid and make it either biscuits or quite running with just controlling an electromagnet and that means you can make those car suspensions either very hard or very soft that with touch of a button now that sounds like quite a cool application I agree but I think we can tell with knowing better although personally I haven't yet except for the bolts it's pretty cool new rule okay today I'm going to be showing you some self pouring liquid so this liquid I have here is called polyethylene glycol it has a molecular weight of about a million compare that to water that has a molecular weight of about 18 so normally what happens if you pour liquid out like water start pouring you tilt it back up is soft this stays about the same level it obviously doesn't keep pouring out when you pour it that's because all the little water molecules all those h2o molecules they're not really linked together because they're so small so as soon as you stop pouring these molecules down here can't pull any other ones out the polyethylene glycol has a much higher molecular weight so it has very very very long chains of molecules on here and they're all mixed together like spaghetti in there and it still just looks like a liquid but on the molecular scale there's very long chains of molecules in there all linked together and so what that does is if you pour the liquid the liquid that has already come out starts pulling the other liquid out and it just keeps pulling it and it essentially pours itself okay tilt it a little get it started should just pull itself out after that there we go that's so cool so even if you just barely pour it just keeps coming out look at that just up and over the end of it so the other cool thing that happens with polyethylene glycol is if you spin a stick in it it climbs the stick see how it came up yeah I again I am enough I made all the way to the top there so another reason you might have heard of polyethylene glycol is because it's also a laxative so got to make sure I don't drink any of this so the consistency of this stuff is just like mucus it's really weird to handle so normally this stuff is just clear but I put blue food coloring in this you could see it better you